Description

This study was a prospective, multicenter, observational cohort study conducted in a cross-section of 20 eligible community hospitals.

Data of existing inpatients in 20 community hospitals were collected. Information collected included demographic, co-morbidities, co-medication, laboratory tests, imaging tests, and anticoagulant use. Inpatients from 20 community hospitals were evaluated for VTE risk by integrating scores such as Caprini, Padua, Khorana and PAPT, and their ability to perform activities of daily living was also evaluated. The stratification of VTE risk and the prevention of VTE in high-risk patients were analyzed, and the efficacy of different VTE risk scores in predicting VTE in community inpatients was compared. VTE risk score was constructed by Delphi method to simplify the clinical VTE evaluation process.

Delphi method was used to construct a VTE risk scoring process: 1) This study initially proposed several VTE risk indicators such as age, length of stay and score of autonomous activity ability through literature review. After analysis, discussion and rectification, the research team members screened the indicators according to the construction principles of the indicator system, and finally preliminatively determined the level and quantity of sensitive indicators. 2) Design expert letter questionnaire: This study plans to conduct a total of 3 rounds of letter questionnaire, which will be distributed and recovered by face-to-face presentation or email. 15 clinical experts with senior titles who have worked in VTE related research fields for more than 10 years, including clinicians, clinical pharmacists and nurses, etc., will be invited. Experts will evaluate all levels and indicators one by one. Likert 5-level scoring method will be adopted for the importance score, and 1-5 points will be assigned according to "not important" to "very important". Modifications, additions or other comments on indicators will be recorded in the expert opinion column. 3) Pairwise comparison of indicators at all levels in the third round of expert letter questionnaire was carried out, and the pairwise comparative importance of each indicator was assigned by the 9-level scale of analytic Hierarchy Process (AHP). Matrix judgment and weight were determined according to the expert evaluation results. Determine the final VTE risk score.

Lower extremity venous ultrasound was performed on more than 1000 patients to obtain the current incidence of VTE among hospitalized patients in the community.

Blood samples were collected from more than 1000 patients, and blood samples from hospitalized patients were collected to determine coagulation function indexes, including prothrombin time, fibrinogen, partial thromboplastin time, thrombin time, fibrin degradation products, D-D dimer, and coagulation active factors.